Sql – Valor NULL i funcions estàndards

SQL – Unitat didàctica 3 Miriam Clavé Ibarz Departament: Informàtica Cicle: Desenvolupament d’Aplicacions Informàtiques (Grau Superior) Crèdit C3: Anàlisi i disseny de base de dades Curs: 2008/2009 5 de desembre 2008

SQL – UD 3 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Valor NULL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Valor NULL ,[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 NULL – NOT NULL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Definició en una BD ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 IS NULL – IS NOT NULL ,[object Object],FALSE FALSE TRUE NULL FALSE TRUE IS NULL TRUE FALSE FALSE NULL TRUE TRUE IS NOT NULL

SQL – UD 3. Exemples IS NULL – IS NOT NULL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Funció ABS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD3 Funcions SIN I COS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Funció POWER ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Funció EXP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],e ≈ 2,7182 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Funció SQRT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3. Funció LOG ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SELECT LOG(-2); +----------+ | LOG(-2) | +----------+ | NULL | +----------+

SQL – UD 3 Funcions SPACE i LENGTH ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD3 Funcions LEFT i RIGHT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Funcions LOWER i UPPER ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Funció SUBSTRING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Funcions LTRIM i RTRIM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Funció REVERSE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 Funció DATEPART ,[object Object],[object Object],[object Object],qq, q quarter wk, ww week hh hour mi, n minute ss, s second ms milisecond mcs microsecond ns nanosecond dw weekday dd, d day dy, y dayofyear mm, m month yy, yyy year Abreviatura datepart

SQL – UD 3 Funció DATEPART ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SQL – UD 3 “Libros en pantalla” ,[object Object],[object Object]

Bibliografia ,[object Object],[object Object]

Sql – Valor NULL i funcions estàndards

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Sql – Valor NULL i funcions estàndards